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CONCRETE IN A MARINE ENVIRONMENT

Concrete in a marine environment was the subject of a five-day international conference held in August, 1980, at St. Andrews by-the-sea, New Brunswick, Canada. The effects of a marine environment on concrete are a major source of concern and research within the industry due to the discovery of offshore gas and oil deposits and the subsequent construction activity this has brought about. Potential tidal power developments will also use concrete. The symposium Proceedings begin with a paper on the durability of concrete in sea water and is followed by a series of papers on permeability and physico-chemical studies of cement pastes, mortars, and concretes exposed to sea water. Other papers concern durability studies being conducted by the Corps of Engineers at its Natural Weathering Exposure Station, Treat Island, Maine; the mechanisms of corrosion of reinforcing steel; case histories of the performance of concrete exposed to sea water; accelerated testing for determining concrete's durability in marine environment; repairs to concrete structures; research and development needs; the performance of lightweight concrete in sea water, and the use of corrosion inhibitors.